Bobbin stripper



Feb. 12, 1935. w. LoNzo BOBBIN STRIPPER Filed Aug. 17, 1935 5 Sheets-sheet 1 w. I 'oNzo BOBBIN STRIPPER Feb. 12, 1935.

s sheetssheet 2 Filed Aug. 17, 1933 ,37mm/J 2750 www@ pff/M,

Feb. 12, 193.5. w. LoNzo BOBBIN STRIPPER Filed Aug. 17, 1933 3 Sheets-Sheet 3 Patented Feb.'

UNITED lSTA-'riss Charles H. Whit'comb, Fitchburg,

Mass.

application august-17. 193s. serial no.' 685.597

9 claim. (ci. :as-'19) invention relates to a machine for re. moving the weft ends from bobbins ejected from,

rather troublesome matter, particularly in con'-n nection with silk looms .where no abrasion or other injury of the surface ofl the bobbin is permissible. ,i

It' 1s the general object of( my invention to provide improved pneumatic means for removing the weft ends from the' ejected bobbins, without injury to the bobbin surface and withou i ;hcontact of any mechanical stru'cture therewi f A further object of the invention is ,to provide a continuously operating machine in which the only duty of theoperator is to place the ejected bobbins in position on a .continuously moving conveyor belt. f

My invention further relates to arrangements and combinations of parts which will be'hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the. invention is shown in the drawings, in which Iliig. 1 is a front elevation of bobbip stripper;

Fig. 2 is an end View, looking in the direction of the arrow 2 in Fig. 1;-

my improved Fig. 3 is a detail sectional view of -a portion;

of'the conveyor; taken along the line 3-3 in Fig. 2;

Fig. 4 is a detail elevation, looking in the direction of the arrow 4 in Fig. 1;

' Fig. 5 is an enlarged partial front elevation ofthe stripper roll;

Fig. 6 is an enlarged plan View of certain parts, looking in the direction of the arrow 6 in Fig. 1;

Fig. 7 is a sectional elevation, taken along the line 7-7 in Fig. 6, and

Fig. 8 is a. detail end elevation, looking in the direction of the arrow 8 in Fig. 1.

` Referring to the drawings, my improved bobbiny stripper comprises a frame 10 having a table mounted on adrivin'g pulley, 15 at one end and on a guide pulley 16 at the other end.

'The guide pulley 15 is mounted on a cross shaft 20 (Fig. 2) rotatable in bearings 21 on the frame .10 and provided with a large pulley 22 at the rear end of said shaft. The pulley 22 is connectedby a belt 23 vto a small pulley 24 -ona 4cross shaft 25 mounted in bearings` 26 carried by an upper or auxiliary frame 30. l

A large pulley 32 (Fig. '2) is securedon the shaft and is connected by a belt 33 to a small pulley 34 on the armature shaft of a driving motor M. The shaft 25 is thus rotated at reduced speed relative to the s peed'of the motor and the shaft 20 is rotated at a still further reduced speed.

The conveyor pulleys 15 and 16 are so located that 4the upper run of the conveyor belt. 14 is above the table portion 11 of the main frame 10, while the lower run of the belt 14 isl belowsaid portion 11.

A supporting member or runway 40 is provided above the table 11 to support the belt during its horizontal upper or operative run, and guide members 41 `(Fig. '1) are provided to prevent lateral displacement of the belt. Similarly. guide members43 are supported below the table .11 and side strips 44 4are mountedonthe members 4 3 and constitute a runway to support the belt duringits return travel.

spaced blocks 50, preferably of wood, are secured to the outer surface of the conveyor belt 14, and pins 52 extend outward from the blocks 50 in which they are firmly secured On the return run, the blocks 50 engage lthe s e strips "44 and thereby support the belt 14.

lA stripper roll 60 provided with a roll shaft 61 is mounted in a swivel bearing 62 (Fig. 1)

at the driving end and in a bearing bracket 63 at the other end. `The bracket 63 is detachably secured on the frame member 64 by a clamping screw 65. The roll 601s tapered from the driving end and is provided with a removable cloth casing 66, preferably having a roughened surface to which threadsv will readily adhere.

A small friction roll 68 is axially adjustable' on th'e'extended driving end portion of the roll shaft 6l andis positioned to engage the face of a friction disc 69 secured to the large pulley 32 on the cross shaft 25. -The stripper roll 60 is thus continuously rotated and thespeed may be varied by adjusting the small friction pulley 68 of the disc 69. l

1'1" portion 11` Fig. '1). A conveyor belt 14 is A vmain Vair supply Pipe '70 (Fig. 4) is oonnected through a valve 71 to branch pipes 72 and '73, which in turn are connected to front and rear perforated tubes 74 and '15, which tubes extend longitudinally of the machine and adjacent the upper run of the conveyor belt 14 at the front and rear thereof.

Theperforations 76 in the tubes '14 and 75 are angularly disposed, as indicated in Fig. '1, and deliver jets of air under pressure in-an upwardly inclined direction against the lower parts of the bobbins B where the weft ends W are wound.

Guide bars-80 (Fig. 6) are supported on brackets 81 at the'front and rear of the bobbins B and closely adjacent thereto. These guide bars prevent upward movement of the bobbins during the stripping operation. An additional guide bar 82 (Fig. l) is mounted at the end of the machine to guide the bobbins around the pulley 16. The stripped bobbins thereafter fall by gravity from the pins 52 into a suitable storage box S.

A nger guard 85 (Figs. 6 and '1) is provided at the front of the beltl4 adjacent the entrance of the bobbins between the guide bars 80. Supports 86 extend upward from the auxiliary frame 30 adjacent the ends of the stripper roll 60 and support a curved cover plate 88 (Fig. 2). A bracket 90 (Fig. 8) is secured to the frame 30 adjacent the detachable bearing bracket 63 for a purpose to be described.

Having described the details of construction of my improved bobbin stripper, the operation thereof is as follows:

When the motor M is started, the cross shafts 25 and 20 are continuously rotated, thus causing slow rotation of the stripper roll 60 and slower travel of the conveyor belt 14.

Assuming that the valve 'I1 is open and that a suitable air pressure is supplied, jets of air will be ejected from the perforations 'I6 in the tubes 'I4 and 15 as indicated in Fig. '1. The operator places bobbins B on the pins 52 at the righthand end of the machine (as viewed in Fig. 1) and the bobbins thereafter travel slowly to the left between the perforated tubes 74 and 'I5 and below the stripper v'coll '60.

The jets of air quickly loosen the ends of weft wound on the bobbins and carry the same upward until the ends engage the rough cloth covering of the roll 60 and become attached thereto. Such engagement of the weft with the stripper roll is facilitated by the curved cover 88 (Fig. 2) which tends to deect the end of the weft against the roll as the weft end is blown upward.

As soon as a weft end is attached to the stripper roll, the rotation of the roll unwinds the remaining weft from the bobbin B, while the guide bars 80 prevent upward displacement of the bobbin if the weft should catch or pull when unwinding.

The rates of travel are so proportioned that any ordinary length of weft end will be completely removed from its bobbin before the bobbin reaches the left-hand end of the conveyor, whereupon it is deposited in the storage box S.

The weft ends are thus removed from the bobbins without contact of any mechanical 4structure with the barrels of the bobbins and without the possibility of injury thereof, lwhich is a very important consideration when weaving silk or other very ne and delicate weft.

When it is desired to remove theaccumulated weft from the stripper roll, the clamping screw 75H 65 is taken out, the bearing bracket 63 removed,

and the roll shaft 6l is swung around to the dotted line position shown in Fig. 8, in which position the roll 60 is supported while the cloth casing 66 is pulled off of the small end of the roll. The accumulated weft may then be easily removed from the collapsed cloth cover. after which the cover may be replaced and the stripping operation resumed.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:--

1. A bobbin stripper comprising a stripper roll, means vto rotate said roll, a bobbin conveyor, means to drive said conveyor to move said bobbins substantially axially of said roll but spaced therefrom, means to loosen the weft ends on bobbins on said conveyor andto cause said loosened weft ends to engage said stripper roll, and means to prevent displacement of said bobbins on said conveyor during subsequent unwinding of the wefts therefrom by said stripper roll.

2. A bobbin stripper comprising an elongated stripper roll, means to rotate said roll, a bobbin v conveyor movable substantially parallel to the axis `of said roll but spaced therefrom, means to drive said conveyor, means to support bol,l bins in -spaced relation on said conveyor with the tips thereof directed toward said roll, and means to blow a weft end loose from each bobbin and into engagement with said stripper roll.

3. A bobbin stripper comprising an elongated stripper roll, means to rotate said roll, a bobbin conveyor movable substantially parallel to the axis of said roll but substantiallyspaced therefrom, means to support bobbins in spaced relation on said conveyor with the tips of said bobbins directed toward said roll, and perforated pneumatic tubes extending at each side of the operative run of said conveyor and below the weft ends wound on said bobbins, whereby said weft ends will be loosened and brought into engagement with said roll.

4. A bobbin stripper comprising an elongated stripper roll, means to rotate said roll, a bobbin conveyor movable substantially parallel to the axis of said roll but substantially spaced therefrom, means to support bobbins in spaced relation on said conveyor with the tips of said bobbins directed toward said roll, and perforated pneumatic tubes extending at each side of the operative run of said conveyor and below the weft ends wound on said bobbins, the perforations of said tubes being at the upper inner portions of said tubes, whereby jets of air are directed against the weft ends on said bobbins and toward the tips of said bobbins.

5. A bobbin stripper comprising a ustripper roll, means to rotate said roll, spaced guide bars extending substantially parallel to the axis of said roll, means to move bobbins successively lengthwise of said roll and between said guide bars, said bobbins being retained onv said moving Ameans by Asaid guide bars, and pneumatic means to transfer loosened weft ends from said bobbins to said stripper roll as said bobbins are moved.

6. .A bobbin stripper comprising a stripper roll, means to rotate said roll; spaced guide bars extending substantially parallel to the axis of said roll, means to move bobbins successively .lengthwise of said roll and between said guide guide means' above said roll efiectlve to doec a loosened weft end against said roll.v

l 7. A bobbin stripper comprising a stripper roll, means to rotate said roll, a bobbin conveyor, means to drive said conveyor to move a succession of bobbins along a path substantially parallel to the axis oi' said roll'and below said roll, pneumatic means to loosen the weft ends on bobbins on said conveyor and to cause said loosened weft ends to engage said stripper roll, and a guide plate above said roll and eie'ctive to direct said loosened weft ends toward said strip- Per YQIL 8. A bobbin stripper comprising.. a stripper roll. means to rotate said roll, a bobbin conveyor, means to drive said conveyor to move said bobbin substantially axially of said stripper roll but spaced therefrom, and pneumatic means effecsaid conveyor as said bobbins pass said pneumatic means and tocause said loosened weft ends to engage said stripper roll and to be entirely removed from said bobbins by said roll.

9. A bobbin stripper comprising a stripper roll, means to rotate said roll, a bobbin conveyor, means to drive said conveyor to move said bobbins substantially axially of said stripper roll but spaced therefrom, and pneumatic means to direct an air blast against the bobbins on said conveyor as said bobbins pass said pneumatic means, whereby the weft ends are loosened from said bobbins and blown toward and caused to engage said stripper roll and; to be thereafter entirely removed from said bobbins by said roll.

WILLIAM `LONZO. 

